Pivot Cradle Bearing Rivet Fixing for Anti-Twist Shell Mounting
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Solution Overview
Problem
Existing pivoting cradle bearings face challenges in manufacturing and stability, particularly in applications with high forces, where the attachment of the inner bearing shell to the pivoting element is not securely maintained without damage.
Innovation Solution
A riveted connection is used to securely attach the inner bearing shell to the pivoting element, allowing for form-fitting and anti-twist functionality, with steel or alloy rivets and a countersunk head design that prevents twisting and allows for easy assembly and disassembly without damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner bearing shell is attached to the pivoting element using conventional methods, then the mounting stability is insufficient under high forces, but using a riveted connection allows permanent stable mounting while enabling easy removal and reassembly
Solution Approach 1:
The attachment system is segmented into removable rivet components that can be independently inserted and secured. The inner bearing shell is divided into segments that can be separately attached to the pivoting element, allowing for simplified assembly and disassembly while maintaining stable mounting under high forces.
Solution Approach 2:
Rivet holes are pre-drilled into the inner bearing shell before assembly, and rivets are pre-positioned in recesses of the pivoting element. This preliminary preparation enables quick and easy assembly without complex manufacturing steps, while ensuring reliable permanent mounting stability under high operational forces.
2Stability of the object's composition
If the bearing shell is designed for secure attachment, then it prevents displacement and twisting, but may cause damage during removal and reassembly
Solution Approach 1:
The attachment system transitions from a static permanent bond to a dynamic removable connection. Rivets can be inserted and removed multiple times, allowing the bearing shell to be securely attached during operation (preventing displacement and twisting) while enabling easy removal and reassembly for maintenance or replacement without causing damage.
Solution Approach 2:
Rivets serve as intermediary elements between the inner bearing shell and the pivoting element. These rivets provide the anti-twist stability and prevent displacement during operation, while their removable nature facilitates easy disassembly and reassembly without damaging the bearing shell or pivoting element.
3Ease of manufacture
If conventional attachment methods are used, then assembly is simple, but the connection is not secure enough for high force applications
Solution Approach 1:
The attachment system uses composite construction combining rivets (made from high-strength materials) with the inner bearing shell and pivoting element. This composite approach provides both simple assembly (by inserting pre-formed rivets) and strong connection strength sufficient for high force applications, achieving both ease of manufacture and connection strength.
Data Source
Figure 1~2
Figure 3~6
AI summary
The invention relates to a pivot cradle bearing (1) comprising a pivoting element (2) which is mounted to pivot in a housing (3), wherein an inner bearing shell (7), on which rolling bodies (4) are rolling, is held on the pivoting element (2). The inner bearing shell (7) is held by rivets (10) in a form-fitting manner on the pivoting element (2) in the circumferential direction of the bearing shell (7).